Problems 1-6 were furnished by Peter Scheetz, Seton School, 9314 Maple Street, Manassas, VA 20110-5118. Problems 7-15 were contributed by Vik Hovsepian and Michael M. Hattar, Rio Hondo College, 3600 Workman Mill Road, Whittier, CA 90601. Problems 16-23 and 25 were submitted by Walter Szetela, P.O. Box 853, Point Roberts, WA 98281. Problem 26 was contributed by James E. Beamer and Bikkar S. Randhawa, University of Saskatchewan, Saskatoon, SK S7N 0W0, along with Cheuk Ng, Athabaska University, Athabaska. Alberta T9S 3A3. Problem 27 was supplied by Marian Small, University of New Brunswick, Fredericton, NB E3B 6E3.